const float GAMMA = 0.7;
const float RL10 = 50;
const int sensorPin = A0; // Pin sensor cahaya
const int ledPin = 2 ;    // Pin LED

void setup() {
  pinMode(sensorPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
int analogValue = analogRead(A0);
float voltage = analogValue / 1024. * 5;
float resistance = 2000 * voltage / (1 - voltage / 5);
float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
Serial.println(lux); // Tampilkan nilai sensor pada Serial Monitor
int threshold = 500;

  if (lux < threshold) {
    digitalWrite(ledPin, HIGH); // Nyalakan LED jika cahaya rendah
  } else {
    digitalWrite(ledPin, LOW); // Matikan LED jika cahaya cukup
  }

  delay(100); // Tunda sebentar sebelum membaca sensor lagi
}